A note if getting the frame cut, make sure the holes are smaller as waterjet cutting makes them 3.25 (too big to tap M3 threads).

Prusa i3 Development and Open Source licenses

Josef Prusa, the genius designer of the various 3D printers that bear his name, has a repository on GitHub with among many other things, the OpenSCAD source code for the printed parts for his Prusa i3. The availability of this source code has made possible the continuous development of new, improved printed parts for the many Prusa i3 variants available around the world.

I urge all developers to properly adhere to and not stray away from, the spirit and the letter of whatever license was used originally for the source code and designs they are working on, as only in this way can further development and improvements remain possible.